Screw thread cutting tool



FIG. 1 is an upper perspective view of our new design for a screw thread cutting tool;

FIG. 2 is an elevated front view thereof;

FIG. 3 is an elevated left view thereof;

FIG. 4 is an elevated right view thereof;

FIG. 5 is an elevated rear view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in the figures are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a screw thread cutting tool, as shown and described. 